Jason Gao wrote: ... > --- IPv6 flow label assignment > > Transport layer may set a 'control' bit in the IPv6 Traffic Class octet of the initiating packet > during the setup phase of a connection. > > > > The edge router inspects the control bit. If it is set, the edge router can further inspect the > packet, and reserve resource as required by the piggybacked resource reservation header in the > transport layer packet, allocate and/or assign a flow label to the expected connection, put the flow > label in the flow label field of the initiating acknowledgement packet. No. There is no such usage of the traffic class octet. See RFC 2474. Also, only the source host of a packet may set the flow label. See draft-ietf-ipv6-flow-label-03.txt Brian